Inside the Stock Market for the Wealthy (It's Invitation Only)

The buzziest companies are sold to a select few as the universe of stocks everyone else can invest in shrinks rapidly

- BY CORRIE DRIEBUSCH

This year’s largest stock sale wasn’t on the New York Stock Exchange or its uptown rival, the Nasdaq Stock Market. Instead, it was a $40 billion offering by OpenAI that was available to only the investors handpicked by the firm’s executive team, i